probability is exactly question

The standard deviation of the lengths of hospital stay on the intervention ward is 7.2 days. Complete parts (a) through (c) below. . . . . O A. Yes, because x is only normally distributed if x is normally distributed. O B. Yes, because the sample sizes are not sufficiently large that x will be approximately normally distributed, regardless of the distribution of x. O C. No, because the sample sizes are sufficiently large that x will be approximately normally distributed, regardless of the distribution of x. O D. No, because if x is normally distributed, then x must be normally distributed. c. Obtain the probability that the sampling error made in estimating the population mean length of stay by the mean length of stay of a sample of 69 patients will be at most 2 days. The probability is approximately]. (Round to three decimal places as needed.)